Power From The...

Researchers have discovered a way to capture and harness energy transmitted by such sources as radio and television transmitters, cell phone networks and satellite communications systems. By scavenging this ambient energy from the air around us, the technique could provide a new way to power networks of wireless sensors, microprocessors and communications chips. “There is [&hellip

eco cleaning tips

A magazine reporter was asking about eco cleaning tips.  After sending off a quick response, I thought I would copy and paste it here along with some links to threads at permies where we talk about it a bit more. 1)  never ever use bleach again.  That stuff is outright poison. 2)  for fighting mold, [&hellip

Medieval smokestacks: fossil...

The history of energy use in human civilisation is generally summarised as follows: from Antiquity until the start of the Industrial Revolution, people made use of the manual labour of both animals and humans, as well as biomass, sun, water and wind. Next, all these renewable energy sources were replaced by fossil fuels: first coal, [&hellip

Energy Efficient Windows

When it comes to windows, many homeowners only think about making changes to the aesthetics. Few people realize window insulation plays a major role in your home’s comfort and energy efficiency, and could be costing you hundred of dollars each year.   In the summer, windows let in light and heat that keeps the air conditioning [&hellip